Battery pack



FIG. 1 is a front perspective view of a battery pack, showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is an enlarged front view thereof;

FIG. 4 is an enlarged rear view thereof;

FIG. 5 is an enlarged right side view thereof; A left side view is a mirror image of the left side view shown in FIG. 5;

FIG. 6 is an enlarged top view thereof; and,

FIG. 7 is an enlarged bottom view thereof.

The bicycle shown in broken lines in FIGS. 1 and 2, and the portions of a bicycle shown in broken lines in FIGS. 3-7, are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a battery pack, as shown and described. 